how 2 block the hole on bottom of inlet

hi any one dun this at all ?? if so how or what do i need 2 do ??

i will have a look at my old one for ya

weld a plate over it .

thats what im getting my mate to do to mine then its off to the garage for mot  !!!?!?!?!    

so your welding a plate over the hole on the under site of the in let yes ???

my mate is ass im not skilled in the art of welding !! grinding the bolts off and welding it shut !! so i can fit the 421 manifold without sucking in air from the bottom of the inlet

What material is the manifold made from? I thought it was cast, or alloy, meaning its not as simple as that to weld it!

its cast i think !! my mate seems to think he will be allright doing it so i will wait for the outcome and post on here  

It's alloy, so wont be easy to weld, ur best bet is to take the inlet off, clean out the hole (get rid of all the carbon) and then fill it up with J.B Weld, i did something similar, because im using a manifold of a polo with weber 32/34 carb the two exhaust ports on the head are useless and u have to cover them up, when my head was being rebuilt i filled the holes up with J.B weld on both ends inside the inlet port and exterior i then smoothed it off,
Pics to illistrate

You can weld aluminium, just need to get the alloy right. Also, having a TIG will help! So maybe the pro welder is all ok with the job. But you'd need to know the exact material…..

my mate is the 4th pit man for some touring car racing team as he is taking it with him to work im sure they will have the right stuff for the job !! if not it will have to be a bolt on plate jobby ! :dontknow:  :dontknow:

BiG_J said

It's alloy, so wont be easy to weld, ur best bet is to take the inlet off, clean out the hole (get rid of all the carbon) and then fill it up with J.B Weld, i did something similar, because im using a manifold of a polo with weber 32/34 carb the two exhaust ports on the head are useless and u have to cover them up, when my head was being rebuilt i filled the holes up with J.B weld on both ends inside the inlet port and exterior i then smoothed it off,
Pics to illistrate

Did you port and polish the head? And did you fit bigger valves? I wanted to do that,but i got a 1.8 engine. And i'm interested what is the limit for 1.3 head?

Sorry for offtopic!

remus said

BiG_J said

It's alloy, so wont be easy to weld, ur best bet is to take the inlet off, clean out the hole (get rid of all the carbon) and then fill it up with J.B Weld, i did something similar, because im using a manifold of a polo with weber 32/34 carb the two exhaust ports on the head are useless and u have to cover them up, when my head was being rebuilt i filled the holes up with J.B weld on both ends inside the inlet port and exterior i then smoothed it off,
Pics to illistrate

Did you port and polish the head? And did you fit bigger valves? I wanted to do that,but i got a 1.8 engine. And i'm interested what is the limit for 1.3 head?

Sorry for offtopic!

Port and polish was a home job, as for valves they're standard size, the black marking you see is the maximum circumference on the head gasket, if you compare my head with a standard head you would see the difference of the combustion chamber, i enlarged mine, i made it more round and curved around the corners for a better squish and to allow more room for the valves so they're not limited for space, no doubt thats lowerd compression but don't know by how how much.
Here some pics after skim and valves inserted.


Grooves on head.

Question ! Have you run that head up yet ? How well is the JB holding ?

and ! WTF are those holes there for in the first place ?!

ta.

Gold-mk1 said

Question ! Have you run that head up yet ? How well is the JB holding ?

and ! WTH are those holes there for in the first place ?!

ta.

Yep the engine is up and running with that head just fine, as for the JB welds it looks solid on the exterior but i cant really tell on whats going on the inside, worst case the jb weld will melt but no sign of it yet, theres no bits commin out the exhaust or anythin, but then again i havent driven it hard or anything, its still off road and i havent packed on any miles on it yet, i take it around the block once  a while to see how the engine copes, so far so good.
The holes are there to heat the manifold up using the exhaust gasses instead of water.

hi ive got my head ported, polished and skimmed as im fitting twin dellortos. Anyway did you change your cam shaft if so what did you use and where did you get it from
thanks martyn 8)

hi ive got my head ported, polished and skimmed as im fitting twin dellortos. Anyway did you change your cam shaft if so what did you use and where did you get it from
thanks martyn 8)

wat is the actual gain fom doing this mod and getting rid of the pipe from the exhaust to the bottom of the inlet? sorry as i am abit clueless.